C / C++ / MFC Discussion Boards

Daniel Strigl2-Oct-02 8:03

2-Oct-02 8:03

I have added a CEdit control and CSpin control to my dialog in the resource editor. So I attached the CSpin control to my CEdit control to inc and dec the value in the edit!
But now, I have the problem, that the spin is working the wrong way! When I click the up button of the spin, the value in the edit will dec, and when I click the down button the value will inc! That's not what I am want! How can I change this????

--
Nice greets, Daniel.

Re: Spin Control Problem!!!

Dimitri Rochette2-Oct-02 9:23

Dimitri Rochette

2-Oct-02 9:23

The "wrong way" is the default way for spin controls.
you will have to use a SetRange32( int nLower, int nUpper );
Set nLower to the MAXIMUN
set nUpper to the MINIMUM

Re: Spin Control Problem!!!

Daniel Strigl2-Oct-02 10:24

Daniel Strigl

2-Oct-02 10:24

Thanks!

--
Nice greets, Daniel.

Re: Spin Control Problem!!!

Gero Gerber2-Oct-02 12:53

Gero Gerber

2-Oct-02 12:53

Hi Daniel,

use CSpinButtonCtrl::SetRange(MIN_VALUE, MAX_VALUE) - this adjusts in which direction you have to press the arrows in order to de- or increase the value in the buddy CEdit box.

Gero

Re: Spin Control Problem!!!

Nilesh Karkhanis2-Oct-02 21:08

Nilesh Karkhanis

2-Oct-02 21:08

Hi Daniel,

You can either give the ranges other way round or you can override CWnd's OnNotify method

BOOL YourClass::OnNotify(WPARAM wParam, LPARAM lParam, LRESULT* pResult) <br />
{<br />
	LPNMHDR pnmh = (LPNMHDR) lParam; <br />
<br />
	if(pnmh->code == UDN_DELTAPOS )<br />
        {<br />
           NM_UPDOWN* pNMUpDown = (NM_UPDOWN*)pnmh;<br />
	   // Check whether the value should be incremented or decremented<br />
  	   if(pNMUpDown->iDelta < 0)<br />
	   {<br />
		//value should be decremented<br />
	   }<br />
	   else<br />
	   {<br />
		// value should be incremented<br />
	   }<br />
        }<br />
  return true;<br />
}

-ve value of delta would suggest decrement and +ve would suggest increment
you can reverse the ways if you like.

Hope that would be of your help.

Nilesh Smile | :)

Re: Spin Control Problem!!!

Daniel Strigl2-Oct-02 23:07

Daniel Strigl

2-Oct-02 23:07

Thanks!

--
Nice greets, Daniel.

CSocket::OnReceive Question

jparsons2-Oct-02 8:06

jparsons

2-Oct-02 8:06

I'm writing a program which uses a derived classe of CSocket to handle incoming data. I have overloaded OnReceive to catch the new data. My question is this.

In my OnReceive function, I read the data and possibly do something with it. The doing something can take a little time. I'm wondering if OnReceive can be called while I'm still processing a previous OnReceive and thus interrupting my processing.

If it can, what kind of protections can I setup to protect the data I access in the function?

Jared
jparsons@jparsons.org
www.prism.gatech.edu/~gte477n

Re: CSocket::OnReceive Question

jmkhael2-Oct-02 8:15

jmkhael

2-Oct-02 8:15

u are just one thread right?? Or multithreading?

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

Re: CSocket::OnReceive Question

jparsons2-Oct-02 11:21

jparsons

2-Oct-02 11:21

Currently the application is single threaded. My question was, si there a possibility that MFC events or whatever they are called, can they overlap. Or will only one be called at any given time

Jared
jparsons@jparsons.org
www.prism.gatech.edu/~gte477n

Re: CSocket::OnReceive Question

jmkhael2-Oct-02 21:44

jmkhael

2-Oct-02 21:44

nope the cant, cos ur single threaded.

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

IXMLDOMNode as an idl parameter

nlecren2-Oct-02 8:05

nlecren

2-Oct-02 8:05

How in the world can i get this to work

if i use IXMLDOMNode in the idl it compiles
if i use the using namespace in the c++ code i'm still good

however the headers created from the idl result in the following:

error C2872: 'IXMLDOMNode' : ambiguous symbol

Help!

Re: IXMLDOMNode as an idl parameter

Stephane Rodriguez.2-Oct-02 9:06

Stephane Rodriguez.

2-Oct-02 9:06

In your idl file,

#include "msxml2.idl";

This will help MIDL solving type, while not including this idl in the type-library.

sometimes it helps to look at the IL generated code
a MS guy on develop.com "answering" .NET issues

Re: IXMLDOMNode as an idl parameter

nlecren2-Oct-02 9:21

nlecren

2-Oct-02 9:21

Tried that and all i get from midl is

error MIDL2025 : syntax error : expecting an interface name or DispatchInterfaceName or CoclassName or ModuleName or LibraryName or a type specification near

idl = [id(1), helpstring("method TestXml")] HRESULT TestXml(IXMLDOMNode *pIXMLDOMNode);
atl class method = STDMETHOD(TestXml)(IXMLDOMNode *pIXMLDOMNode);

Re: IXMLDOMNode as an idl parameter

Stephane Rodriguez.2-Oct-02 9:42

Stephane Rodriguez.

2-Oct-02 9:42

Ok, I have found the issue. The version of msxml.idl shipping with VC++6 and VS.NET is MSXML2. And the idl provided does not include the declaration of IXMLDOMNode.

You need MSXML3, and higher. Download the SDK here[^].

I just did a test, it went fine with import "msxml2.idl";. I had also to make sure this file msxml2.idl supersedes msxml.idl from the included header directories.

PS : I would suggest you don't marshall IXMLDOMNode* at all, just a void* instead. And then you do a proper QI or cast in the implementation code.

sometimes it helps to look at the IL generated code
a MS guy on develop.com "answering" .NET issues

Problem automating Excel

Anonymous2-Oct-02 7:43

Anonymous

2-Oct-02 7:43

Hello:

I'm having problems trying to add a serie to a chart. This piece of code illustrates my problem:

_ChartPtr pChart= pCharts->Item["G1"]; // Get an existing chart (OK)

_WorksheetPtr pWorksheet= pWorksheets->Item["S1"]; // Get an existing worksheet (OK)

SeriesCollectionPtr pSeries= pChart->SeriesCollection(); // Get its series collection (OK)

RangePtr pRangeSector1= pWorksheet->Range["$C$5:$C$8"]; // Get a worksheet range (OK)

// I am only trying one of these lines

// Line 1
SeriesPtr pSerie1= pSeries->Add((IDispatch *)pRangeSector1, Excel::xlColumns); // Try to add a serie (exception launched)

// Line 2
SeriesPtr pSerie2= pSeries->Add("C5:C8", Excel::xlColumns); // Try to add a serie (exception launched)

Where is the mistake?

Thanks in advance.

Smart Pointer question

User 98852-Oct-02 7:40

User 9885

2-Oct-02 7:40

I have a class say, CClass thats inherts from two abstract interface definition classes, say IInterface1 and IInterface2. I have a vector of IInterface1 pointers and a vector of IInterface2 pointers. If the pointer of CClass is added to both these vectors, is there a smart pointer inplemenataion that would delete CClass, only when pointers in both vectors are deleted?

I am not very familiar with smart pointers, but was curious to know whether smart pointers would work in this case. I am looking for a generic C++ solution, not a COM or MFC based solution.

I looked at shared_ptr in boost.org, but could not make a judgement about this from the docs and examples.

Thomas

modified 29-Aug-18 21:01pm.

map object in STL

ns2-Oct-02 7:33

2-Oct-02 7:33

I have a map of int, int.

Someone told me that this statement below will create the element of index n1 and fill it with n2:

n2 = myMap[n1];

instead of the othe way around which works as well. THe benefit of the above method is that if that element already exists in the map, then in one shot we either accessed it (pree-exist) or created it (wasnt there). Seems so counterintuitive. Is it ccorrect? Didnt see anything like it in my books...

Appreciate your help,
ns

Re: map object in STL

Marc Britten2-Oct-02 7:38

Marc Britten

2-Oct-02 7:38

myMap[n1] = n2; SHOULD work, ie create an entry if it does not already exit

n2 = myMap[n1]; SHOULD NOT work, it should create an entry if it does not exist and give n2 its value.

Re: map object in STL

ns2-Oct-02 7:47

2-Oct-02 7:47

Okay.But if myMap[n1] just got created its empty right? So n2 = 0.

Appreciate your help,
ns

Re: map object in STL

C^hris L^osinger2-Oct-02 7:41

C^hris L^osinger

2-Oct-02 7:41

ns wrote:
Someone told me that this statement below will create the element of index n1 and fill it with n2

it's not true, and you can prove it with the code below.

map<int, int> myMap;

   int t = 50;
   t = myMap[10];

   map<int, int>::iterator it;

   for (it=myMap.begin(); it!=myMap.end(); it++)
   {
      printf("%d, %d\n", (*it).first, (*it).second);
   }

the output is 10, 0; not 10, 50.

it will create the element, but the value part of it is the default value for the object (for an int, i guess the default is 0, in debug mode anyway).

if you want to set the value, you have to use : myMap[10] = 50;

-c

All you have to do is tell the people they are being attacked, and denounce the opposition for lack of patriotism and exposing the country to danger.
-- Herman Goering, on how to control the public

War Pigs

Re: map object in STL

ns2-Oct-02 7:48

2-Oct-02 7:48

Many thanks. Clear now.,

Appreciate your help,
ns

Is there a way to send a script file to a server and run it there in VC++ code?

Anonymous2-Oct-02 7:21

Anonymous

2-Oct-02 7:21

Hi all.
I have a application writen in VC++. I need to execute a script file on a server in it. Did any one know how to do it?

Thanks for any clue.

Tida

Re: Is there a way to send a script file to a server and run it there in VC++ code?

TyMatthews2-Oct-02 10:54

TyMatthews

2-Oct-02 10:54

What kind of script file... like an NT command script, or ??

If all you need to do is execute a cmd script remotely, you can do that without any code. Look at soon.exe in the NT reskit, which will let you execute cmd scripts on remote servers.

Otherwise, via C++ you can launch a cmd script like this:

ShellExecute( NULL, "open", "c:\\my_script.cmd", NULL, "c:\\", SW_SHOWNORMAL );

Take a look at MSDN for descriptions of the parameters to ShellExecute.

Ty

"The significant problems we face cannot be solved at the same level of thinking we were at when we created them." -Albert Einstein

Catch image bar under the mouse

progman2-Oct-02 6:59

progman

2-Oct-02 6:59

Does anybody have a sample or idea about how to get image in coordinates of the mouse pointer ?

thank you !

makeing VC project with MINGW

sagmam2-Oct-02 6:49

sagmam

2-Oct-02 6:49

Hi, I've got a VC6.0 project, and I exported a MAK file for it using VStudio. I want to MAKE the project using the MINGW (Minimalist GNU for Win32) package. Is it possible to use the MAK file that VStudio creates and pass it on to mingw32-make.exe somehow?

/=/=/=/=
Deus
/=/=/=/=

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